Full NULL pointer given exception

gistfile1.txt

A ArgumentError occurred in health_check#index:

 NULL pointer given
 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/easy.rb:371:in `easy_getinfo_string'

-------------------------------
Request:
-------------------------------

 * URL       : http://www.myapp.com/health-check
 * IP address: XXX.XXX.XXX.XXX
 * Parameters: {"action"=>"index", "controller"=>"health_check"}
 * Rails root: /var/www/myapp/releases/20111216122556

-------------------------------
Session:
-------------------------------

 * session id: "424b47463ea9c1d34adcfdfb35d6a39e"
 * data: {:return_to=>"/health-check",
    :recently_viewed=>[],
    "flash"=>{},
    :cart=>#<Cart:0xf53cf2e4 @orders={}, @orderset_detail=nil>}

-------------------------------
Environment:
-------------------------------

 * CONTENT_LENGTH            :
 * DOCUMENT_ROOT             : /var/www/myapp/current/public
 * HTTP_CONNECTION           : close
 * HTTP_HOST                 : www.myapp.com
 * HTTP_USER_AGENT           : libwww-perl/5.808
 * PASSENGER_CONNECT_PASSWORD: UcoaRnxaFOUgBnzdyILV3OpQGpe1pdjX6Y7oiBrUVfL
 * PATH_INFO                 : /health-check
 * QUERY_STRING              :
 * REMOTE_ADDR               : XXX.XXX.XXX.XXX
 * REMOTE_PORT               : 51666
 * REQUEST_METHOD            : GET
 * REQUEST_URI               : /health-check
 * SCRIPT_NAME               :
 * SCRIPT_URI                : http://www.myapp.com/health-check
 * SCRIPT_URL                : /health-check
 * SERVER_ADDR               : XXX.XXX.XXX.XXX
 * SERVER_ADMIN              : noreply@myapp.com
 * SERVER_NAME               : www.myapp.com
 * SERVER_PORT               : 80
 * SERVER_PROTOCOL           : HTTP/1.1
 * SERVER_SOFTWARE           : Apache/2.2.8
 * _                         : _

 * Process: 10804


 * Server : 001

-------------------------------
Backtrace:
-------------------------------

 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/easy.rb:371:in `easy_getinfo_string'
 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/easy.rb:371:in `get_info_string'
 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/easy.rb:150:in `primary_ip'
 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/hydra.rb:242:in `response_from_easy'
 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/hydra.rb:185:in `get_easy_object'
 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/easy.rb:337:in `call'
 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/easy.rb:337:in `success'
 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/multi.rb:21:in `multi_perform'
 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/multi.rb:21:in `perform'
 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/hydra.rb:95:in `run'
 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/request.rb:181:in `run'
 /usr/lib/ruby/gems/1.8/gems/typhoeus-0.3.2/lib/typhoeus/request.rb:186:in `get'
 [RAILS_ROOT]/app/controllers/health_check_controller.rb:7:in `index'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/base.rb:1166:in `send'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/base.rb:1166:in `perform_action_without_filters'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/filters.rb:579:in `call_filters'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/filters.rb:572:in `perform_action_without_benchmark'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
 /usr/lib/ruby/1.8/benchmark.rb:293:in `measure'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/rescue.rb:201:in `perform_action_without_caching'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/caching/sql_cache.rb:13:in `perform_action_without_newrelic_trace'
 [RAILS_ROOT]/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:33:in `cache'
 [RAILS_ROOT]/vendor/rails/activerecord/lib/active_record/query_cache.rb:8:in `cache'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/caching/sql_cache.rb:12:in `perform_action_without_newrelic_trace'
 /usr/lib/ruby/gems/1.8/gems/newrelic_rpm-2.9.4/lib/new_relic/agent/instrumentation/controller_instrumentation.rb:138:in `passenger_orig_perform_action'
 /usr/lib/ruby/gems/1.8/gems/newrelic_rpm-2.9.4/lib/new_relic/agent/method_tracer.rb:62:in `trace_method_execution_with_scope'
 /usr/lib/ruby/gems/1.8/gems/newrelic_rpm-2.9.4/lib/new_relic/agent/instrumentation/controller_instrumentation.rb:122:in `passenger_orig_perform_action'
 /usr/lib/ruby/gems/1.8/gems/newrelic_rpm-2.9.4/lib/new_relic/agent/method_tracer.rb:38:in `trace_method_execution_no_scope'
 /usr/lib/ruby/gems/1.8/gems/newrelic_rpm-2.9.4/lib/new_relic/agent/instrumentation/controller_instrumentation.rb:117:in `passenger_orig_perform_action'
 /usr/lib/ruby/1.8/phusion_passenger/classic_rails/request_handler.rb:66:in `perform_action'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/base.rb:529:in `send'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/base.rb:529:in `process_without_filters'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/filters.rb:568:in `process_without_session_management_support'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/session_management.rb:130:in `process'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/base.rb:389:in `process'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:149:in `handle_request'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:107:in `dispatch'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:104:in `synchronize'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:104:in `dispatch'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:120:in `dispatch_cgi'
 [RAILS_ROOT]/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:35:in `dispatch'
 /usr/lib/ruby/1.8/phusion_passenger/classic_rails/request_handler.rb:51:in `process_request'
 /usr/lib/ruby/1.8/phusion_passenger/abstract_request_handler.rb:513:in `accept_and_process_next_request'
 /usr/lib/ruby/1.8/phusion_passenger/abstract_request_handler.rb:274:in `main_loop'
 /usr/lib/ruby/1.8/phusion_passenger/classic_rails/application_spawner.rb:321:in `start_request_handler'
 /usr/lib/ruby/1.8/phusion_passenger/classic_rails/application_spawner.rb:275:in `send'
 /usr/lib/ruby/1.8/phusion_passenger/classic_rails/application_spawner.rb:275:in `handle_spawn_application'
 /usr/lib/ruby/1.8/phusion_passenger/utils.rb:479:in `safe_fork'
 /usr/lib/ruby/1.8/phusion_passenger/classic_rails/application_spawner.rb:270:in `handle_spawn_application'
 /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:357:in `__send__'
 /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
 /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
 /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:180:in `start'
 /usr/lib/ruby/1.8/phusion_passenger/classic_rails/application_spawner.rb:149:in `start'
 /usr/lib/ruby/1.8/phusion_passenger/spawn_manager.rb:219:in `spawn_rails_application'
 /usr/lib/ruby/1.8/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add'
 /usr/lib/ruby/1.8/phusion_passenger/spawn_manager.rb:214:in `spawn_rails_application'
 /usr/lib/ruby/1.8/phusion_passenger/abstract_server_collection.rb:82:in `synchronize'
 /usr/lib/ruby/1.8/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
 /usr/lib/ruby/1.8/phusion_passenger/spawn_manager.rb:213:in `spawn_rails_application'
 /usr/lib/ruby/1.8/phusion_passenger/spawn_manager.rb:132:in `spawn_application'
 /usr/lib/ruby/1.8/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application'
 /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:357:in `__send__'
 /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
 /usr/lib/ruby/1.8/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
 /usr/share/phusion-passenger/helper-scripts/passenger-spawn-server:99